Swept-sine test is often applied in order to simulate the real vibration situations of aircrafts, vehicles, watercrafts, and electron devices. The article focuses on the the control method for the newly developing Multi-Input Multi-Output (MIMO) swept-sine test. A new method named Overlapped Windows and Extension (OWAE) is proposed to smooth the discontinuous signal segments of two sinusoid waves with different frequencies. The method can improve the control precision and meet the requirement of swept time. The uncorrelated integration method is used to identify the amplitude and phase of the steady state sine signal. The frequency response functions (FRFs) are calculated by the Linear Time Invariant (LTI) system theory. The formula with the amplitudes and phases as the control objects for MIMO swept-sine test is derived. The control signal is updated by comparing the feedback response and the reference. An example is given to simulate a two-input two-output swept-sine control system. The results show the validity of the raised control method.
张步云，陈怀海，贺旭东. 多输入多输出正弦扫频试验控制新方法[J]. 振动与冲击, 2015, 34(8): 198-202.
ZHANG Bu-yun, CHEN Huai-hai, HE Xu-dong. New Control Method for the MIMO Swept-sine Test. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(8): 198-202.
[1] 胡志强. 随机振动试验应用技术[M]. 北京：中国计量出版社，1998.
HU Zhi-qiang. Applied technology of random vibration test[M]. Beijing: Chinese Metrology Press, 1998.
[2] Chinese PLA General Armament Department. GJB150.16A- 2009, Laboratory Environmental Test Methods for Military Materiel[S]. 2009.
[3] 夏益霖. 多点正弦模态试验技术的注记[J]. 强度与环境, 1993,4:10-20.
XIA Yi-lin. Notes on the multiple-input modal testing technique with sine dwell excitation[J]. Structure & Environment Engineering, 1993,4:10-20.
[4] Thomas JR. Multi-frequency swept sine testing for automotive durability testing of engine mounted components[J]. SAE Technical Paper.
[5] 于慧君, 陈章位, 王庆丰. 一种加窗重叠信号平滑连接方法及其在振动信号预处理中的应用[J]. 振动与冲击, 2007,26(8):39-40.
YU Hui-jun, CHEN Zhang-wei, WANG Qing-feng. A signal smooth linking method and its application vibration signal pre- processing[J]. Journal of Vibration and Shock, 2007, 26(8):39-40.
[6] 姜双燕. 多轴向多激励振动控制的研究与实现[D]. 南京：南京航空航天大学，2011.
JIANG Shuang-yan. Study on multi-exciter multi-axis vibration control and its implementation[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2011.
[7] 杨志东, 丛大成, 韩俊伟, 李洪人. 正弦扫频振动控制中的信号综合与信号分析[J]. 振动工程学报, 2008,21(3):309-313.
YANG Zhi-dong, CONG Da-cheng, HAN Jun-wei, et al. Signal synthesis and analysis for swept-sine vibration control[J]. Journal of Vibration Engineering, 2008,21(3):309- 313.
[8] Niu BL, Yan X. A FFT-based variety smpling-rate sine sweep vibration controller[C]// IEEE Int. Conf. Neural Networks & Signal Processing, Nanjing, Chian, 2003,12:14-17.
[9] Gloth G, Sinapius M. Analysis of swept-sine runs during modal identification[J]. Mechanical System and Signal Processing, 2004,18:1421-1441.
